Thomas p



-(NOModeL) T P BARRY STEAM VALVE.

Patented Oct. 2, 1883.

WITNESSES f 2 7%INVEN'IiOR, v IF f 7 i/ ATTOR YS.

Human STATES PATENT Grinch,

STEAM-VA LVE.

SPECIFICATION forming part of Letters Patent No. 2 85,955,

dated October 2, 1883.

Application filed March 13, 1883. (Nomodch) To CLZZ whom, it mayconcern.-

Be it known that I, Tnorms I BARRY, of Stillwater, in the county ofSaratoga and State of New York, have invented certain new and usefulImprovements in Steam-Valves; and I do hereby declare that the followingis a full, clear, and exact description of the invention, which willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, which form apart of this specification, and in which- Figure 1 is a verticalsectional view of my improved valve. Fig. 2 is a similar view at rightangles to the view shown in Fig. 1. Fig. 3 is a detail view of thecylindrical valve-seat removed from the valve-box; and Fig. 4 is adetail view of the sliding valve.

Similar letters of reference indicate corresponding parts in all thefigures.

My invention has relation to valves for regulating or controlling theflow of steam under pressure; and it consists in the detailedconstruction and combination of parts of a valve,

U which, while suitable for all purposes for which valves of this classare usually employed, is particularly adapted, in con'j unetion with anap paratus'for automatically operating the valve, which forms thesubject of a separate application for Letters Patent, to regulate thefiow of steam from a boiler to the driers or dryingcylinders of apaper-machine.

In the accompanying drawings, A is the valve-chest 0r valve-chamber,whichis in the form of a cylindrical boX', having an outlet, a, on oneside, which connects with the pipe, through which steam is fed to thedriers. Into box A are screwed the heads Band C, the former having astuffingbox, D, through which the valve-stem E passes.

F is the cap or cover of the stuffing-box, which is screwed down uponthe packing (1, so as to pack the stem of the valve.-

The bottomOis cast with a cylindrical box, H, which is closed at thetop, but has side openings, h h, for the escape of the steam whichenters the valve through a pipe screwed into the lower threaded part, 0.One side of box H, between its ports h II, has a longitudinal groove orchannel, 1 into which projects the inner end of a pin, I, insertedthrough one side of the sliding valve. The cylindrical box H forms aseat for the valve, which consists of a ring or sleeve, K, at the lowerend of a yoke, L, to the cross-head L of which the valvestem E isfastened. This cross-head has a circular raised part or shoulder, M,encircling the valve-stem,for the purpose hereinafter indi cated. Thevalvesleeve K is swelled midway between the arms of the yoke, as shownat k, and is cut out or arched at its lower beveled rim in, a line withthe yoke-arms, as shown at Z. When the valve is placed upon its seat H,the pin 1, projecting into the vertical. channel 17 of the seat, causesit to be held in its true position relative to the valve-ports 71 71, soas to close or open the same, according to the height at which the valveis elevated on its seat.

N is a coiled spring, which is placed inside of the cylindricalchamber 1) in the top or head 13 of the valve-box, encircling thevalve-stem, which passes freely through it. In raising the valve, so asto open the ports to let on a full head of steam, its circular shoulderor offset M will strike against the lower free end of this spring, andthereby not only cushion the up ward motion of the valve, but, by itsexpansion, start the valve 011 the downward stroke. The valveseat andvalve are so arranged inside of the valve-chamber that the ports willface the chest or box A on opposite sides of the steam-outlet a, so thatthe valve chest or chamber will be filled with steam before the steamcan escape through the outlet. By this arrangement the sliding valve isperfectly balanced whatever its position may be, so that its adjustmentcan be efiected with great nicety and with a minimum of power foroperating it. This is of great importance in valves intended to workautomatically, in order to insure their successful operation. Ifdesired, the steam may enter the valve at a and leave the same throughthe bottom port, 0.

Having thus described my invention, I claim and desire to secure byLetters Patent of the United States- The combination of the valve-chestA B 0, having ports a and O, valveseat H, made in one piece with thebottom 0 of the valve-chest,

ICQ

and having; ports h h at right angles to port a In testimony that Iclaim the foregoing as of the chest, sliding valve, consisting of the myown Ihave hereunto afiixell my signature IO sleeve K, yoke L L L,shoulder M, and valvein presence of two witnesses.

stein E, and spring N, proj eating with its lower free end down into acircular recess in the top of the valve-chest adapted to fit shoulder Mof the valve, substantially as and for the purpose herein shown andspecified.

\ THOMAS P. BARRY.

\Vitnesses:

LoUIs BAGGER, ARTHUR L. MORsELL.

